• Issue
    Volume 42, Issue 6
    September 2023

Issue Information

Free Access

Issue Information

  • First Published: 19 September 2023

ORIGINAL ARTICLES

Articles

Open Access

Texture Inpainting for Photogrammetric Models

  • First Published: 28 February 2023
Description unavailable

We devise a technique to remove texturing artefacts that are typical of 3D models acquired by photogrammetric techniques. The system constructs a local parametrization P around the texture defect, fills its domain with the texture data, and performs a context-aware inpainting operation using a neural network.

Line Drawing Vectorization via Coarse-to-Fine Curve Network Optimization

  • First Published: 01 March 2023
Description unavailable

We propose a novel line drawing vectorization framework based on coarse-to-fine curve network optimization. Our vectorization tool is able to produce high-quality curves that are faithful to the original inputs and close to the connectivity of human drawings.

tachyon: Efficient Shared Memory Parallel Computation of Extremum Graphs

  • First Published: 05 March 2023
Description unavailable

This paper describes a GPU-CPU hybrid parallel algorithm for computing the extremum graph of scalar fields in all dimensions. An open source software library, TACHYON, that implements the algorithm exhibits superior performance and good scaling behaviour. Extremum graph for the silicium grid (left) and gradient paths between maxima and 2-saddles that constitute arcs of the graph (right).

Open Access

Break and Splice: A Statistical Method for Non-Rigid Point Cloud Registration

  • First Published: 13 March 2023
Description unavailable

Labels and clusters can be used to leverage the computations to identify and group point sets with similar structure.

  • The refined in each cluster is used to overcome the distribution irregularities of points.
  • This statistical-based non-rigid point cloud registration approach can address the challenges of connections and separations caused by object deformation and large inter-frame motions

Feature Representation for High-resolution Clothed Human Reconstruction

  • First Published: 29 March 2023
Description unavailable

We propose a unified feature representation for high-resolution clothed human reconstruction, which integrates the human shape feature representation and the details feature representation to finish high-quality reconstruction for clothed human with arbitrary poses and clothing details.

Open Access

3D Generative Model Latent Disentanglement via Local Eigenprojection

  • First Published: 04 April 2023
Description unavailable

This work introduces a new loss function grounded in spectral geometry and applicable to different neural-network-based generative models of 3D head and body meshes. A model trained with our local eigenprojection loss (1), can be used to generate and edit human shapes by directly manipulating the latent variables (2).

Adversarial Interactive Cartoon Sketch Colourization with Texture Constraint and Auxiliary Auto-Encoder

  • First Published: 18 April 2023
Description unavailable

We propose a colorization approach for cartoon sketches, which takes both sketches and color hints as inputs to produce impressive images.

Open Access

Efficient Hardware Acceleration of Robust Volumetric Light Transport Simulation

  • First Published: 27 April 2023
Description unavailable

Unified points, beams and paths (UPBP) is a light transport algorithm that is capable of simulating light effects in arbitrary input scenes that contain participating media. UPBP uses bidirectional path tracing and photon density estimation to form full light paths by combining subpaths from light sources with subpaths the camera. Multiple importance sampling is used to compute the weight of these light paths, which is a computationally expensive task. We derive a new algorithm to more efficiently compute this weight, which improves over previous work by eliminating the need to iterate over all path vertices.

Garment Model Extraction from Clothed Mannequin Scan

  • First Published: 14 May 2023
Description unavailable

We propose an approach to acquire high-fidelity 3D models of off-the-shelf clothing using a mannequin with simple setup. Extraction of both tight and loose garments from clothed mannequin scans is enabled with a single pipeline.

Open Access

Visually Abstracting Event Sequences as Double Trees Enriched with Category-Based Comparison

  • First Published: 22 May 2023
Description unavailable

We introduce double trees as a visualization approach to abstract and compare event sequences. The approach aggregates the sequences before and after an interactively selected event of interest. We extend the approach to contrast event sequences discerned into colour-coded categories by user-defined criteria.

A Survey of Personalized Interior Design

  • First Published: 22 May 2023
Description unavailable

This paper conducts a systematic survey on the recent progress of personalized interior design (PID) from furniture selection and floor plan preparation. The former selects furniture in a consistent style according to user preference, while the latter generates a reasonable floor plan design according to the house structure.

Open Access

It's about Time: Analytical Time Periodization

  • First Published: 24 May 2023
Description unavailable

A complex dynamic phenomenon may consist of heterogeneous components with diverse patterns of changes over time. Our approach to producing a unified periodization for multiple heterogeneous components is designed for situations where the user wants to understand the overall behaviour of the phenomenon as a whole by obtaining an easily understandable representation. The approach involves a combination of computational and interactive visual techniques that support division of time into meaningful and manageable periods enclosing different relatively stable states or development trends, which may include creation and subsequent integration of multiple different divisions.

MesoGAN: Generative Neural Reflectance Shells

  • First Published: 26 May 2023
Description unavailable

We introduce MesoGAN, a model for generative 3D neural textures. This new graphics primitive represents mesoscale appearance by combining the strengths of generative adversarial networks (StyleGAN) and volumetric neural field rendering. The primitive can be applied to surfaces as a neural reflectance shell and rendered in modern path tracers.

Model-based Crowd Behaviours in Human-solution Space

  • First Published: 06 July 2023
Description unavailable

We present a new continuum simulation framework in human-solution space for realistic crowd motion generation. To leverage the advantages of model-based and data-driven approaches, a multi-granularity physics-based model is designed to be data-friendly. To achieve better realism, an acceleration-aware data-driven optimization scheme is proposed to mimic real-world motion dynamics.

Harmonized Portrait-Background Image Composition

  • First Published: 02 August 2023
Description unavailable

This paper presents a novel end-to-end network architecture for portrait-background composition. The method adjusts the appearance of portraits to make them compatible with backgrounds, while the generation of the composited images satisfies the prior of a style-based generator. The proposed method outperforms other state-of-the-art methods on the synthesized dataset and the real composited images and shows robust performance in video applications.

Recurrent Motion Refiner for Locomotion Stitching

  • First Published: 12 August 2023
Description unavailable

We propose a neural network-based character locomotion stitching technique with recurrent motion refiner (RMR). We created paired data through novel data generation that employs K-nearest neighbour search and trained our network to connect discontinuous locomotions into a single natural locomotion.

EvIcon: Designing High-Usability Icon with Human-in-the-loop Exploration and IconCLIP

  • First Published: 19 August 2023
Description unavailable

This research introduces a human-in-the-loop framework, EvIcon, designed to improve the usability of interface icons. The framework uses a refined version of a large-scale pre-trained joint image-text embedding (IconCLIP) and a new dataset, IconCEPT10K, to provide instant feedback on icon usability and visual distinguishability. The proposed framework enhances the icon revision process and results in interface icons with better semantic distance and familiarity.

Open Access

Episodes and Topics in Multivariate Temporal Data

  • First Published: 28 August 2023
Description unavailable

We applied a theoretical model to develop an abstract general approach to analysing episodes (prolonged events) characterised by multiple time-variant attributes. It involves incrementally increasing the level of data abstraction by merging multiple elements into patterns. In an example implementation, we used topic modelling to obtain multi-attribute variation patterns.

Distributed Poisson Surface Reconstruction

  • First Published: 31 August 2023
Description unavailable

This work presents a novel implementation of the screened Poisson surface reconstruction algorithm that allows the reconstruction to be distributed across multiple clients using a client-server system, with only a small number of synchronization barriers. By decomposing the solution of the linear system into low-frequency (global/server) and high-frequency (local/client) components, leveraging padding, and enforcing a connected isosurface, we obtain a solution that exhibits no artifacts at client boundaries and is indistinguishable from the single-client solution.

Major Revision from Pacific Graphics

Open Access

A Semi-Procedural Convolutional Material Prior

  • First Published: 10 March 2023
Description unavailable

We propose a semi-procedural differentiable material prior that represents materials as a set of grayscale noises and patterns that are processed by a sequence of lightweight learnable convolutional filter operations. Combined with a differentiable rendering, we enable single-image tileable material capture comparable with state of the art.

Numerical Coarsening with Neural Shape Functions

  • First Published: 17 March 2023
Description unavailable

We propose to use nonlinear shape functions represented as neural networks in numerical coarsening to achieve generalization capability as well as good accuracy. To overcome the challenge of generalization to different simulation scenarios, especially nonlinear materials under large deformations, our key idea is to replace the linear mapping between coarse and fine meshes adopted in previous works with a nonlinear one represented by neural networks.

Open Access

Two-Step Training: Adjustable Sketch Colourization via Reference Image and Text Tag

  • First Published: 05 April 2023
Description unavailable

This paper presents two-step training and spatial latent manipulation based on a pre-trained Convolutional Neural Network and self-adaptive Multilayer Perceptron. The proposed model can achieve high-quality and color-adjustable results using reference images and text tags.

Reference-based Screentone Transfer via Pattern Correspondence and Regularization

  • First Published: 17 April 2023
Description unavailable

Reference-based screentone transfer results by our method. Given a line drawing (i.e. input), and a reference manga image, our model can transfer the screentone pattern from the reference to the line drawing. We show each group of the results with three different reference manga images per row.

OaIF: Occlusion-Aware Implicit Function for Clothed Human Re-construction

  • First Published: 21 April 2023
Description unavailable

With the occlusion-aware feature representation, the proposed method can improve the quality of re-constructed geometry and pose robustness for single-view clothed human re-construction.

ROI Scissor: Interactive Segmentation of Feature Region of Interest in a Triangular Mesh

  • First Published: 28 April 2023
Description unavailable

We present a simple and effective method for the interactive segmentation of feature regions in a triangular mesh. The experimental results show several segmentation results for various 3D models, revealing the effectiveness of the proposed method.

Accompany Children's Learning for You: An Intelligent Companion Learning System

  • First Published: 03 July 2023
Description unavailable

We proposed an intelligent companion learning system named IARE, which seamlessly integrates AR and AI based on the ARCS model, trying to stimulate the role of parents and provide an intelligent and companion-based learning experience for children learning by themselves.

Major Revision from EuroVis Symposium

Open Access

State of the Art of Molecular Visualization in Immersive Virtual Environments

  • First Published: 24 February 2023
Description unavailable

In this review, we survey the literature focusing on molecular visualization in immersive environments. We report on various enabling technologies, such as head-mounted displays and augmented and mixed reality. Furthermore, we identify key domains, use cases, and visualization and interaction techniques employed by the current research.

Open Access

Evonne: A Visual Tool for Explaining Reasoning with OWL Ontologies and Supporting Interactive Debugging

  • First Published: 12 March 2023
Description unavailable

We present Evonne as a comprehensive web tool for explaining reasoning through interactive visualizations of proofs and ontologies. Evonne uses specialized views for exploring explanations of logical consequences and the knowledge from which these are derived, additionally supporting repair of ontologies in case of erroneous entailments.

Open Access

Visual Parameter Space Exploration in Time and Space

  • First Published: 03 April 2023
Description unavailable

In our survey of visual parameter space exploration with spatial/temporal data, we identify five themes forming the components of a common workflow.

Open Access

Faster Edge-Path Bundling through Graph Spanners

  • First Published: 03 April 2023
Description unavailable

S-EPB computes an edge-path bundling of a straight-line drawing (a) by bundling along paths in a t-spanner (b), a sparse sub-graph, while still avoiding edge ambiguities in the bundled drawing (c).

Open Access

Are We There Yet? A Roadmap of Network Visualization from Surveys to Task Taxonomies

  • First Published: 04 April 2023
Description unavailable

In this paper, we aim at providing researchers and practitioners alike with a roadmap detailing the current research trends in the field of network visualization. We design our contribution as a meta-survey where we discuss, summarize, and categorize recent surveys and task taxonomies published in the context of network visualization.

Open Access

Multilevel Robustness for 2D Vector Field Feature Tracking, Selection and Comparison

  • First Published: 13 April 2023
Description unavailable

This paper introduces a new multilevel robustness framework for studying time-varying vector fields, which can differentiate the behaviours of critical points in terms of their multiscale stability. This framework supports feature tracking, selection and comparison, and improves the visual interpretability of vector fields from scientific simulations.

iFUNDit: Visual Profiling of Fund Investment Styles

  • First Published: 11 June 2023
Description unavailable

iFUNDit is an interactive visual analytics system for fund investment style analysis. Itdecomposes a fund's critical features into performance attributes and investment stylefactors, and visualizes them in a set of coupled views: the Fund View and Manager View, todelineate the distribution of funds' and managers' critical attributes on the market; the Cluster view, to show the similarity of investment styles between different funds; and theDetail View, to analyze the evolution of fund investment style. The system provides a holisticoverview of fund data and facilitates streamlined analysis of investment style at both thefund and the manager level. The effectiveness and usability of the system are demonstrated through domain expert interviews and case studies by using a real mutual fund dataset.

Open Access

A Characterization of Interactive Visual Data Stories With a Spatio-Temporal Context

  • First Published: 15 August 2023
Description unavailable

We combined and adapted three existing design spaces for visual data stories to classify 130 spatio-temporal stories collected between 2018 and 2022. An analyzis of the collected data revealed various patterns, for example how large-scale struggles shape the development of storytelling techniques.

Open Access

Smooth Transitions Between Parallel Coordinates and Scatter Plots via Polycurve Star Plots

  • First Published: 16 August 2023
Description unavailable

This paper presents new techniques for seamlessly transitioning between parallel coordinate plots, star plots, and scatter plots. The design led to a variant of the star plot with curved connections between axes and a geometrically motivated embedding of scatter points from a scatter plot into star and parallel coordinate plots.

Major Revision from Eurographics Conference

Open Access

Triangle Influence Supersets for Fast Distance Computation

  • First Published: 06 June 2023
Description unavailable

We present a structure to efficiently query the Signed Distance Field (SDF) of triangle meshes. The method stores the triangles influencing the field behaviour in each region of an adaptative grid to accelerate the nearest triangle search task later.

Major Revision from EG Symposium on Geometry

Open Access

ARAP Revisited Discretizing the Elastic Energy using Intrinsic Voronoi Cells

  • First Published: 04 April 2023
Description unavailable

Our findings demonstrate that the original ARAP approach can be construed as minimizing a discretization of an elastic energy that is based on non-conforming elements defined over dual orthogonal cells of the mesh. By utilizing intrinsic Voronoi cells instead of an orthogonal dual of the extrinsic mesh, we ensure that the energy remains non-negative within each cell. We depict the intrinsic Delaunay edges as polylines over the mesh, represented in barycentric coordinates relative to the mesh vertices. This modification of the original ARAP energy, which we refer to as iARAP, resolves issues arising from non-Delaunay edges in the original method. In contrast to the spokes-and-rims version of the ARAP approach, it is less sensitive to the triangulation of the surface.